Letter-copying- press



UNITED sTATEs PATENT oEEIoE.

GEORGE C. TAFT, OF WORCESTER, MASSACHUSETTS.

LETTER-COPYING PRESS.

Specification forming part of Letters Patent No. 28,020, dated April 24,1860; Ressued May 20, 1873, No. 5,417'.

To all whom it may concern.'

Be it known that I, GEO. C. TAET, of Worcester, in the county ofWorcester and Commonwealth of Massachusetts, have invented certain newand useful Improvements in Letter-Copying Presses; and I do herebydeclare that the following is a full and exact description thereof,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, forming a part of this specification.'

Figure l is a side view of my improved press, and Fig. 2 is a sectiontaken through the center of the press.

A is the base, bed, or platen to which the standards B, B, are fastenedby nuts B, B. The standards B, B, support the arched cross piece C, andto which they are fastened as shown at o o in Fig. 2. The standards B,B, are grooved out on their inner sides as shown at e, e, for thepurpose of admitting the lugs f, of the platen D. A tubular or socketpiece E is cast with and forms a part of the platen D. The socket pieceE is smoothed on the outside, but has a female screw 0;, on the interiorsurface thereof, and which is formed by a core of sand, so that afterthe platen is taken from the mold all that is necessary to do to t thefemale screw a, for the reception of the male screw F, is simply to runa tap of the proper size up and down a few times in the socket piece E,for the purpose of removing the roughness of thefscrew. lThe archedcross piece o, is provided with a' hollow cylindrical enlargement E, theinterior Z9, of which is traversed by the socket piece E, of the platenD, see Fig. 2. To the upper end of the male screw F, is attached theoperating lever G (which is provided at each end with a ball I-I), bymeans of the cap nut and screw J.

The operation is as follows, viz: The book containing the letter `to becopied being placed between the platen D, and the bed A, the platen isforced down by turning the screw F, the shoulder cZ, striking against ashoulder in the archcross piece C. Vhen the platen is raised the socketor tubular part of the platen rises up until it strikes against theshoulder o.

By 'adopting the plan which I have devised for making letter copyingpresses, they can be manufactured at greatly reduced prices, while atthe same time they are not liable to get out of repair, nor are any ofthe parts easily detached.

Then the press is not in use, the screws are completely secured againstinjury from dust or from any other cause consequent upon their beingexposed to view.

The tubular part E, of the platen D, can be cast quite thin and light,since there is no danger of splitting it, as but little force isnecessary in order to remove the roughness of the screw a, while theexpense of construction is very much-less than it would be if the screwa had to be formed by boring and tapping.

Having described my improved letter copying press, what I claim as newand desire to secure by Letters Patent is- 1. Casting the platen D, andtubular piece E, in one piece and at a time, in combination with formingthe screw o, by covering as and for the purposes set forth.

2. I also claim the combination of the single platen piece D, E, andscrew a, with screw F, arch piece C, shoulders o, (l, and socket b, allarranged and operating in relation to each other, as and for thepurposes set forth.

GEO. C. TAFT. I/Vitnesses:

JAMES H. BANoRoET, T. I-I. RICE,

DANIEL TAINTER.

